Rotary cutting tool



Mmh 3o, 1926. 1,579,102

C E GALE v ROTARY CUTTING TOOL Filed Dec. 4, 1923 Patented Mar. 30, 1926.

'FF-ioni CHARLESA n. GALROE WEYMOUTH, "MASSACHUSETTS,fassiefnon-QRYinnsivn AssIGR--' MENTS, To GRERNFIELD v'rar AND DIE ooRPoRATioN,-os oHUsRTfrs, A CORPORATION orn/nassfionnsnr'rs.4

ROTARY cumino; trenini-' l T o nllio'hom'z't may concern,

Beiti known `that 'I,l GrrnLnscitizen''ofthe United'fstat'es, residing at*v Teyinout-h," iii ther-county of' Norfo'llean'd State of Massachusetts, have invented'cer withon one hole and serve to guide the progress ofi cutting blades'through l'another *holes* In the' irst' instance," when vall thei blades are cutting-blades,' itispreferablefthat thefeffeci tivecut-tingLdiameter of all tliesetsf be the'v same. In lthe second instance, when guide blades are used, it may be desirable to yhave their Yperipheralfacestravel inla surface ofrevolution of less or greater diameter than f' theefeetive' diameter" of the cuttingbl'adesi In -either case,- once `they dia-nnetrical f relation' of the several sets vis determined; be they tlie' same'or different', it isA desirable to have this relation between them continue'` constant," while permitting f-theiry effective` diameters' I to be yenlarged orf decreased=- to accommodate the 4cutting offdi-Her'ent size holes.``

It is among the'V obj ectsl of :the present; iin-f' vention y-to make v'possible `thel laccomplish-Y ment gof theseV ldesired',results-by .making allof the-- blade-sets .adjustableisi-multaneonsly.l alongY the axis-otthetoohand thereby radi-y ally-thereof, to'cha'n-ge theirz eective' diame-lters by. vthe samefamountg' and by?l makfing'frf any of the v"blade-sets separately Fadjustablef y along the tool to vary its Veffective diameter' vwithoutaltering thatgo'f another set.

These objects are accomplished by provid- 1 groovesspaced longitudinal-ly alongzthe axis of. the tool, 'whose bottoms Ijdiverg'e 1 equally from the tool axis; yA bladeset'is arranged in each-set of 'grooves and 'is held 'there by f cla mpingmembersy engaging 'the f ends of! its blades, there being'` a Aclampingmember intermediateJ each two successive ,setsof? blades" and actingon botlr of themiyand the several A n Vtween the grooves-oi 'the otherfset,witlitheffi sets of blades being Ymovable together 'longipatentable 'directionoi the rean nr.

tudin'any Ory there@ to; "adjust air br uitjes blade-sf simultaneously andl siiiiil lrly," loti': ward orf inward' depending upon avl'iet'l'iei the longitudinal movement is upwardlor downward along the groove "bottoms- Theinternu'ediate` 'clamping' member.' serves' not 60 onlyi as a clarifip butal'sfo` asl 'aV spajcer, andasf 1 a means whereby f the'ltw'o vsets"""oif"j iblade's' l* which engage it* may be separately `"adj usteilrI along the toolwith'respect vtov eacl'i'*-otheri thus 'enabling their vrespective [effective di-j" amete'rs tobevaried.'vv When Athus*adjtis', d with respect' to-"ea'c'h fother they-'may'. the i afterf be' moved together along the grooves to increase' `or "decrease theirveiiective diameter but during 'such 'moven'ient "the actual' differf ence between their effective "diameters, as' 'def-1"' termin'ed by' "-tle 'J'setting of tlie iinterme'( liafefl` y" The .invent-ion:y is illustrated-and described closed. In theI` accompanyingdrawings? y' v Figure" f1 isa sileviewbf re'amer Sem-f v sbodyingi the' invention; Y'

Figure 2 is a medi'al section, fon" 'line 2.-'2185 of Figure1;=" y r `1 Figure f34 is" another i'medial 'Section5-taken f at a 45- f angl'e'to tlle vsection 'ofFigu'reEV Q-,i-asf-ff Y on line'r3-f31ofIiigure6;#v w

Figures /l-and 5 "are similar views oftlie no intermediate Vmember showing' litl lin fili-flier# ent-'adjusted positions; i Figure v`is an lend view; .andf1 ,i ,c u Figures y7 and@ are,sectionson"y lin`es17+e7 and 8f-8 otFignres .2 and 3 respectively?. 05 Referringwto the drawings, whichshow a i reanier havingfonlyftwo sets 'ot blades-,itlie`- shaft orbodylil of the reameris'providedr :with tapered longitudinal grooves -Bt andfCf arrangedEinf-two 'separat-e" setsfwhere'in the 10o blades arespacedjapart in; the longitudinal i In the particular' embodiment "shown," ine which thereY arev two `Y setsoifour grooves each',`those otonelset displaced an'gularlyl "459 from Athose of the' k'105 adjacentend portions of the grooves sidev by side. The bottoms E of all the grooves are inclined alike so that as a whole they form a blade support tapered toward one end of the reamer, both sets being tapered toward the same end. The blades I4` and Gr are made with correspondingly inclined under or inner surfaces H so that when bottomed in a groove each operating edge H will be parallel to the axis of the tool. The ends Il" of the blades are beveled, so that when engaged by the undercut ends of the clamping members I and J, they will be both clamped end- Vwise and pressed firmly against the groove bottom.V

The remote end-clamping members I are shown in the form of nuts having threaded engagement with the reamer body. The interinediatev member or sleeve .J has a smooth interior surface and is slidable along and around the slightly reduced portion A of` j thefreamer body. VThis member J is made in two parts J and J, on one of which are extending tongues or struts K adapted to fit within recesses or notches L in the opposingfedge vof the other part. These notches `areof different depths, except that those forming each diainetrically opposite pair are equal, so that the member J may in eiiect be made longer or shorter'according t0 the particular notches chosen to receive the tongues. By thus altering the length of the intermediate member the blades of one set vmay be shifted along their grooves to a different position therein, either nearer to lor farther away from the blades of the other set, withoutaltering the positions of the latter in their' respective grooves. This ein.

ables the radial projection of the blades of oneset to be adjusted to'V correspond with or differ from the radial projections of the.

blades in the next adjacent set. But when once so set all the blades and the intermediate member may be shifted together as a unit along the` tool by merely backing oill one end clamp nut I and setting up the other. In thismanner the blades in al1 of the sets are simultaneously adjustable, and whatever may be the relation of the blades in one set to the blades in another set, this relation will be maintained regardless of the simultaneous longitudinal shifting. Both sets of blades may be cutters or one set may be guides and the other set cutter, or the one set maybe a combined cutting and guiding blade as ai'e blades Gr shown.

lIhe advantage of having the different sets of blades separately adjustable enables one set of blades to take asort of roughing cut whilethe following set, being of slightly larger diameter can finish the lhole with a high degree of smoothness. Or if two aligned holes are to be made larger, the leading blades can be set as of the diameter of Y be possible if the grooves were in alignment. This allows a short intermediate member to be employed, and makes longitudinal com.-

pactness possible. Y

I claim as my invention: Y l, l. A reamer comprising a body, blades carried by the body and arranged in sets f spaced longitudinally yof the body, and means for simultaneously yadjusting the blades in all of said sets.Y

2. A reainer comprising a body, blades carried by the body and arranged in sets spaced longitudinally of the body, and means for simultaneously moving said sets longitudinally and thereby radially of the oc y.

3. A-cutting tool comprising albodyrhaving 4inclined grooves; longitudinally spaced blades slidably mounted in said grooves and provided with beveled ends; an intermediate member arranged between the adjacent ends of said blades and provided with beveled ends adapted to engage and hold the blade ends; and holding means engaging the remote ends or" the blades, all of the blades and said member being movable simultaneously along the tool.

4. A reainer comprising a body provided .with grooves arranged in sets spaced longitudinally of the body and having their'bot- Y toms inclined;.blades having beveled ends in said grooves, Y whereby, on sliding, their cutting edges proradially of said and .slidablyv engaging gress longitudinally and body; a sleeve interposed between the inner ends of said blades and having beveled ends adapted to engage said inner ends ofthe blades; and nuts having threaded engagelll) ment with the end portions of said body, ar

ranged. to retain said sleeve and blades in tight engagement.l

5. AV selfVV guided cutting tool havinga succession of blades along its axis, comprising the combination, with the body and said blades mounted thereon, of means adapted to clamp all of the blades endwise, and a medial member, loose on the body and adapted to clamp adjacent ends of endwise adjacent blades, as the said endwise clamping means move toward each other.

6. A self guided cutting-tool having a suc-V cession of blades along its axis, comprising the combination, with the body and said las body; blades carried by the body and ar-l endwise clamp being movable along the -bodyu while engaging it for clamping, andthe me dial clamp being free to, slide endwise therewith.

7. A rotary cutting tool comprising a ranged in sets spaced longitudinally thereof; and means holding said blades on the body, comprising a spacer of variable length arranged between successive sets.

8. A rotary cutting tool comprising a body provided with grooves havingtheir bottoms inclined with respect to the aXis; bladesl arranged in sets, spaced longitudinally, slidably engaging in said grooves, whereby, on sliding longitudinally their cut' ting edges' progress also radially of said body; and an intermediate `spacing member whose length is variable, between the successive sets, thereby to vary the relativeradial settings of the said sets.

9. A rotary cutting tool comprising 'a body, blades carried by the body and arranged in sets spaced longitudinally thereof; and an intermediate twopart member, arranged between successive blade sets, engaging their Aadjacent ends; there being a tongue on one part of said member, and notches of varying depths in the other part adapted to receive the tongue, thereby to permit the said member to be adjusted to variousV lengths, and so to vary the longitudinal relay tion of the blade sets with respect to each 10.*A rotary cutting tool comprising a body; blades carried by the body and arranged in sets spaced longitudinally thereof;

and means for simultaneously adjusting the blades in all vo-said sets; saidmean's omprising a device adapted to permit varied settings of the blade sets longitudinally with respect to each other.

11. A rotary cutting tool comprising a body having inclined grooves, longitudinally spaced setsv of blades slidably mounted in said grooves, and means for simultaneously adjusting the blade sets along said grooves to vary their radial projection; said means comprising a device adapted.; to .permit varied settings of oneblade set longitudinally with respect to another blade set thereby to vary their respective radial projections.4 j c l2. A rotary cuttingtool having grooves arranged in setsspaced longitudinally of the body, with the grooves of onev set displaced angularly about the body with respect to those of they next adjacent set, blades carried by the body and arranged in` said groove, and means for holding the blades in the grooves comprising an intermediate member encircling the said body and adapted to hold the adjacent ends of successiv blade sets. f

13. yA rotary cutting tool having grooves arranged in successive sets spaced longitudinally yand angularly about the body, the grooves of each vset being cut in themidst of the extensions of the portions of the body that lie between the grooves of the next with adjacent end portions side by side; blades carried by the body and arranged in said grooves; and means for holding .the blades in the grooves comprising `an intermediate member adapted to encircle the body around..

the side by side groove ends and engage the adjacent ends of the blades in successive sets.

Signed at Boston, Massachusetts, this thirtieth day ofNovember, 1923.

CHARLES n. GALE; 

